Food.

I learned in my Biology classes that our bodies are built so that we take good care of ourselves.
But if that's the case, then why do we LOVE junk food and CRAVE it even when we don't need it?
Think about it--you're not even really that hungry, and your tongue kinda feels like being happy, so hey, out of that awesome lean turkey in the fridge and that seriously artery-clogging donut your brother left on the counter this morning, you decide to go for that donut.
And then later, you freak out and work it all off.
Or, if you're like me, you freak out and then complain about not having any way to exercise during your day and about how you're going to get fat.
And yet, you still don't go for that turkey until you run out of junk to stuff your face with.
The more I think about it, the more I feel like our bodies want to live and help us be happy, but if we get too happy, it's our bodies' job to make sure we DIE.
Or something.